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New project: Supplemental Hydraulics on Dynamark/MF14


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#1 frenchy OFFLINE  

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Posted August 16, 2011 - 11:23 AM

So I decided to put some additional hydraulics on my Dynamark/MF14. A couple of my co-workers suggested using a Power steering pump from an old Chevy pickup. Here's a pic of the pump mounted on the side of the tractor and the new pulley mounted on the shaft in front of the PTO pulley. All i need is some hoses, valve and a cylinder and i'm in business. It'll be used to lift my blade when front mounted and snowblower once I get it retro fitted. I figure i'll make a 3pt hitch and use the current system for that. (see other post on Dynamark 3pt for that one)

Pump and Pulley Mount.jpg

#2 NUTNDUN OFFLINE  

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Posted August 16, 2011 - 12:11 PM

Hydraulic lift is great for heavy implements. How did you center the axillary pulley before welding it or was it the same size as the engine shaft?

Are you going to have to cut the hood for it to fit with everything mounted?

#3 cp7 OFFLINE  

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Posted August 16, 2011 - 12:13 PM

Another way to go is to use the 12 volt pump off an automobile convertible top.
Since there's no belt it can be allot cleaner installation.

#4 frenchy OFFLINE  

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Posted August 16, 2011 - 12:52 PM

I got the aux pulley and hub from a local Ag shop. It was the same 1 1/8" shaft size and included a key way and set screws. I just needed to weld on the pulley to the hub. Worked out perfectly. The one issue is the pulley on the pump has a much narrower v groove than the aux pulley. I'll need to find the perfect belt to be a happy medium on both. Unfortunately i will have to cut the side of that beautiful cast grill, but for what it's going to do for me, i'm happy!

#5 Alc ONLINE  

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Posted August 16, 2011 - 09:08 PM

I think a NAPA store would be able to make you hoses to match the pressure fitting outlet to you hyd.valve. Also if you have the pressure hose that came on the pump the crimp can be cut off the fitting used on the new hose to save you a few bucks . Al

#6 frenchy OFFLINE  

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Posted August 17, 2011 - 09:57 AM

Thanks Al. My father in law's hardware shop does hydraulic hoses and fittings, so I have a good hook up :)

#7 Alc ONLINE  

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Posted August 17, 2011 - 10:38 AM

That's great to have someone with an "in" , might come in handy matching up fittings on projects like yours , Al

#8 KennyP ONLINE  

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Posted August 17, 2011 - 05:11 PM

Looks to be a good project, Frenchy. Thanks for posting the pics and hope to see more.

#9 frenchy OFFLINE  

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Posted September 08, 2011 - 04:26 PM

So i have my lines all connected, cylinder and valve etc. Even at high throttle, the cylinder doesn't want to move. I noticed a couple of things: the cylinder can move about 4" (has 8" stroke) by hand (like there is air in it) and when I operate the valve with a hose allowing some bleed room, the tank overflows. What do you guys think is wrong? Do i need a bigger reservoir for the fluid? HELP!

#10 Alc ONLINE  

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Posted September 09, 2011 - 05:18 AM

Maybe if you take some pictures of your valve , cylinder and plumbing someone will be able to help you out , Al

#11 massey driver ONLINE  

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Posted September 09, 2011 - 07:21 AM

Is your cylinder single or double acting.Using a pump with a small oil tank and a single acting cylinder will cause the above problem.Another thing to make sure is that seeing its a power steering pump is your control valve for a open looped system.I'am no expert but just some things to check.Larry

#12 frenchy OFFLINE  

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Posted September 13, 2011 - 11:35 AM

hey Massey driver, it's a double acting. I'm not sure what the valve is designed for. It's from an old fork lift.

#13 massey driver ONLINE  

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Posted September 13, 2011 - 09:10 PM

. I'm not sure what the valve is designed for. It's from an old fork lift.


That could be the problem if you don't know what or how the valve works.What you can do it remove the lines to the cylinder and let the pump run briefly the oil should run through the valve and back into the tank.and not out the lines to the cylinder.When you pull on the valve see if oil comes out either line .That should tell you if there's something wrong with your valve.Larry

#14 Alc ONLINE  

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Posted September 14, 2011 - 07:35 AM

This could be a very dumb question but could the pump be turning the wrong way ? Al

#15 ducky OFFLINE  

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Posted September 14, 2011 - 08:03 AM

This could be a very dumb question but could the pump be turning the wrong way ? Al


Ditto
Also do you have any pics of the valve and show us where the line go. I am an old forklift wrench. If the valve is from an ICE truck (lp/gas) it will 99% be open center.




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